What are best practices for naming variables in PHP functions for clarity and logic?

When naming variables in PHP functions, it is important to choose names that are clear, descriptive, and logical. This helps improve the readability and maintainability of your code. One common best practice is to use meaningful names that accurately describe the purpose of the variable. Avoid using generic names like $temp or $data, and instead opt for names that reflect the data or value being stored. Additionally, follow a consistent naming convention, such as camelCase or snake_case, to make your code more uniform and easier to understand.

// Example of naming variables in a PHP function for clarity and logic

function calculateTotalPrice($productPrice, $taxRate, $quantity) {
    $subtotal = $productPrice * $quantity;
    $taxAmount = $subtotal * $taxRate;
    $totalPrice = $subtotal + $taxAmount;

    return $totalPrice;
}